24. He is very about his chance of winning a scholarship this semester.
A. optional
B. obvious
C. optimistic
D. conventional
网友回答
A. optional
B. obvious
C. optimistic
D. conventional
解析：本题考查形容词。Optional选修的；obvious显然地；conventional传统的。 be optimistic about sth. “对……持乐观态度”。句意：他对他这学期获得奖学金的机会非常乐观。